EP2098257B1 - Wundverbandöffnung und zugehöriger Wundverband - Google Patents

Wundverbandöffnung und zugehöriger Wundverband Download PDF

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Publication number
EP2098257B1
EP2098257B1 EP09152714.3A EP09152714A EP2098257B1 EP 2098257 B1 EP2098257 B1 EP 2098257B1 EP 09152714 A EP09152714 A EP 09152714A EP 2098257 B1 EP2098257 B1 EP 2098257B1
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EP
European Patent Office
Prior art keywords
wound
reservoir
backing layer
portal member
wound dressing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP09152714.3A
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English (en)
French (fr)
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EP2098257A1 (de
Inventor
Mark Vess
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Smith and Nephew Inc
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Smith and Nephew Inc
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Publication date
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Priority to EP14176147.8A priority Critical patent/EP2810667A1/de
Publication of EP2098257A1 publication Critical patent/EP2098257A1/de
Application granted granted Critical
Publication of EP2098257B1 publication Critical patent/EP2098257B1/de
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/05—Bandages or dressings; Absorbent pads specially adapted for use with sub-pressure or over-pressure therapy, wound drainage or wound irrigation, e.g. for use with negative-pressure wound therapy [NPWT]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/02—Adhesive bandages or dressings
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/02—Adhesive bandages or dressings
    • A61F13/0203—Adhesive bandages or dressings with fluid retention members
    • A61F13/0206—Adhesive bandages or dressings with fluid retention members with absorbent fibrous layers, e.g. woven or non-woven absorbent pads or island dressings
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/02—Adhesive bandages or dressings
    • A61F13/0203—Adhesive bandages or dressings with fluid retention members
    • A61F13/0226—Adhesive bandages or dressings with fluid retention members characterised by the support layer
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/02—Adhesive bandages or dressings
    • A61F13/0246—Adhesive bandages or dressings characterised by the skin-adhering layer
    • A61F13/025—Adhesive bandages or dressings characterised by the skin-adhering layer having a special distribution arrangement of the adhesive
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/02—Adhesive bandages or dressings
    • A61F13/0259—Adhesive bandages or dressings characterised by the release liner covering the skin adhering layer
    • A61F13/0266—Adhesive bandages or dressings characterised by the release liner covering the skin adhering layer especially adapted for wound covering/occlusive dressings
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/71—Suction drainage systems
    • A61M1/74—Suction control
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/84—Drainage tubes; Aspiration tips
    • A61M1/86—Connectors between drainage tube and handpiece, e.g. drainage tubes detachable from handpiece
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/90—Negative pressure wound therapy devices, i.e. devices for applying suction to a wound to promote healing, e.g. including a vacuum dressing
    • A61M1/91—Suction aspects of the dressing
    • A61M1/912—Connectors between dressing and drainage tube
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/90—Negative pressure wound therapy devices, i.e. devices for applying suction to a wound to promote healing, e.g. including a vacuum dressing
    • A61M1/91—Suction aspects of the dressing
    • A61M1/915—Constructional details of the pressure distribution manifold
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F2013/00089—Wound bandages
    • A61F2013/0028—Wound bandages applying of mechanical pressure; passive massage
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/90—Negative pressure wound therapy devices, i.e. devices for applying suction to a wound to promote healing, e.g. including a vacuum dressing
    • A61M1/92—Negative pressure wound therapy devices, i.e. devices for applying suction to a wound to promote healing, e.g. including a vacuum dressing with liquid supply means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M27/00—Drainage appliance for wounds or the like, i.e. wound drains, implanted drains

Definitions

  • the present disclosure relates generally to a wound dressing for treating an open wound with a vacuum wound therapy treatment.
  • the disclosure relates to a dressing having a portal member providing a connection to a vacuum system such that a reservoir over the wound may be evacuated.
  • the body's natural wound healing process is a complex series of events beginning at the moment of injury. Initially the body reacts by delivering proteins and other factors to the wound through the blood stream to minimize the damage. Blood clots to prevent blood loss while cells engulf bacteria and debris to carry it away from the wound site. Next, the body begins to repair itself in a stage of healing often referred to as the proliferative phase. This phase is characterized by the deposition granulation tissue in the wound bed. Granulation tissue provides a base structure over which cells may migrate inwardly from the periphery to close the wound. Finally the process ends as collagen gives strength to new tissue over time often forming a scar.
  • VWT vacuum wound therapy
  • a reduced pressure e.g. sub-atmospheric pressure
  • the reduced pressure may be effective to promote blood flow to the area to stimulate the formation of granulation tissue and the migration of healthy tissue over the wound by the natural process.
  • a reduced pressure may assist in removing fluids exuding from the wound, which may inhibit bacterial growth. This technique has proven effective for chronic or non-healing wounds, but has also been used in for other purposes such as post-operative wound care.
  • the general VWT protocol provides for the introduction of an absorbent filler material, such as non-reticulated foams, non-woven fabrics, or gauze, into the wound to absorb exudates.
  • an absorbent filler material such as non-reticulated foams, non-woven fabrics, or gauze
  • the wound and the absorbent filler material may then be overlaid by a flexible cover layer such as a polymeric film, for example, to establish a vacuum reservoir over the wound where a reduced pressure may be applied by individual or cyclic evacuation procedures.
  • the cover layer may include an adhesive periphery that forms a substantially fluid tight seal with the healthy skin surrounding the wound.
  • a cover layer will often include a connector or portal member to which air hoses from an external vacuum system may be connected.
  • An aspect of concern in a VWT treatment is the migration of the filler material and wound exudates in the direction of airflow when the reduced pressure is applied. These substances may be deposited on surfaces within a portal member, for example, and over time cause the obstruction or complete occlusion of these portal members. This phenomenon may limit the level of exudate flow from the wound area, or may even prohibit the application of a reduced pressure to the wound area, thus limiting or defeating the effectiveness of the VWT treatment. Accordingly, a need exists for a dressing suitable for use in a VWT procedure.
  • a wound dressing for treating an open wound with a vacuum wound therapy system in accordance with claim 1.
  • the primary and supplemental apertures may be distributed substantially over the entire reservoir surface of the portal member.
  • the portal member may be molded from a flexible polymeric or elastomeric material.
  • the portal member may include an attachment flange adapted for connection to the backing layer.
  • the backing layer of the wound dressing may comprise a flexible polymeric membrane.
  • the backing layer may include an adhesive coating around the periphery thereof, the adhesive coating adapted to affix the backing layer over the wound and to provide a fluid tight seal around the perimeter of the wound.
  • the adhesive coating may be interrupted such that an intermediate portion of the backing layer remains uncoated.
  • the contact layer may be a film having conical apertures to promote unidirectional flow of exudates from the wound.
  • the absorbent filler material may include a single strand of a polyolefin filament.
  • the vacuum wound therapy system may further comprise a vacuum system fluidly communicable with the reservoir.
  • the vacuum reservoir may include a vacuum source, a collection canister and a one-way valve.
  • the wound dressing of the present disclosure promotes healing of a wound by providing a reservoir over the wound where a reduced pressure may be maintained.
  • the reservoir subjects the wound to a sub-atmospheric pressure to effectively draw wound fluid, including liquid exudates, from the wound without the continuous use of a vacuum pump.
  • vacuum pressure may be applied once, or in varying intervals depending on the nature and severity of the wound.
  • the use of a wound dressing in this manner has been found to promote healing by reducing the probability of infection, stimulating the deposition of granulation tissue and other beneficial processes.
  • the wound dressing of the present disclosure includes a backing layer affixed to a portal member for enhancing the effect of a vacuum wound therapy treatment.
  • a vacuum wound therapy system for use on a wound "w" surrounded by healthy skin “s.”
  • the vacuum wound therapy system 10 includes a vacuum system 12 in fluid communication with a vacuum reservoir 14 defined by or within wound dressing 16 ( FIG. 4 ).
  • the vacuum system 12 includes a vacuum source 18 coupled to the dressing 16 through a one-way valve 20 and a suction device such as vacuum tube 24.
  • a collection canister 28 may be provided for wound drainage and debris.
  • the vacuum system 12 is adapted to provide a reduced pressure to the vacuum reservoir 14 appropriate to stimulate healing of the wound "w.” A more detailed description of an appropriate vacuum system 12 is found in commonly assigned U.S. Patent Application Publication 2007/0066946 .
  • Wound dressing 16 generally includes a contact layer 34, filler 38 and a cover layer 40.
  • Cover layer 40 includes a backing layer 44 and a portal member 46.
  • Portal member 46 is configured to establish fluid communication between vacuum reservoir 14 and vacuum system 12 by providing an interface for a suction device such as vacuum tube 24.
  • a suction device such as vacuum tube 24.
  • Contact layer 34 may be sufficiently conformable to be positioned in direct contact with an irregularly shaped surface of a wound bed "w."
  • a thin film of polyethylene or other suitable non-adherent material may form the contact layer 34 to limit the adherence of filler 38 and other substances to the wound "w.” Apertures or perforations in the film permit fluids to pass through the contact layer 34, allowing for the sub-atmospheric pressure to penetrate into the wound "w” and for exudates to flow freely out of the wound "w.”
  • the passage of wound exudate through contact layer 34 may be controlled so as to be substantially unidirectional to prevent wound exudate from flowing back into the wound "w".
  • a conical apertured film such as VENTEX TM by Kendall Corp., a division of Covidien, or apertured films by Tredegar Film Products of Richmond, VA, may be selected for forming contact layer 34.
  • Unidirectional flow of exudates may also be promoted by the selection of other materials including a lamination of layers having varying absorptive characteristics.
  • One exemplary material, which may be used as a contact layer is sold under the trademark XEROFLO® by Kendall Corp., a division of Covidien.
  • Filler 38 may be arranged over contact layer 34 to fill wound "w" to the level of the surrounding healthy skin "s.”
  • An absorbent material such as non-woven gauze or reticulated foam may be used for filler 38 to trap any exudate that migrates through contact layer 34.
  • An antimicrobial dressing sold under the trakemark KERLIX® by Kendall Corp., a division of Covidien, may be suitable for use as filler 38.
  • the filler 38 may also comprise a material configured such that any stray fibers do not tend to protrude through apertures of contact layer 34 where they may become engulfed by newly forming granulation tissue.
  • the manufacturing process for synthetic fibers often includes an extrusion of an indeterminate length of continuous filaments, which are spun together to form fibers. It is the continuous lengths of un-spun filaments which are referred to as tow.
  • a single length of tow formed from a hydrophobic material such as polyolefin may be laid in the wound bed “w" to form filler 38. This arrangement allows for a complete removal of filler 38 when the dressing 16 is changed without re-injuring the wound "w.”
  • Cover layer 40 may be supplied as a single unit including both backing layer 44 and portal member 46, or alternatively, these items may be provided individually and assembled at the time of installation over the wound "w.” Cover layer 40 may be placed over the wound "w” enclosing the contact layer 34 and filler 38 therein.
  • Backing layer 44 may be formed from a flexible polymeric membrane or film to serve as a fluid barrier to allow for a sub-atmospheric pressure to be established in vacuum reservoir 14, and also as a microbial barrier preventing contaminants from entering the wound area.
  • backing layer 44 may comprise a polyurethane film having a thickness from about 0.02 mm to about 0.025 mm.
  • the backing layer 44 is formed from a moisture vapor permeable membrane to promote the exchange of oxygen and moisture vapor between the wound site and the atmosphere.
  • One exemplary material is a transparent membrane sold under the trade name POLYSKIN® II by Kendall Corp., a division of Covidien.
  • Other materials which may be suitable for use in a backing layer include the thin films marketed under the names TEGADERM TM by 3M of St. Paul, MN and OPSITE TM by Smith and Nephew PLC of London, UK.
  • the backing layer 44 of cover layer 40 is adapted to extend laterally beyond the perimeter of the wound bed "w" so as to contact the healthy skin "s” to form a seal thereto.
  • backing layer 44 may be equipped with an adhesive coating on all, or any appropriate portion of a wound facing side.
  • the adhesive coating may comprise, for example, a medical-grade, pressure-sensitive adhesive adapted to provide a fluid-tight and bacteria-tight seal around the wound "w.”
  • the adhesive coating may, for example, be in the range from about 0.025 mm to about 0.25 mm thick.
  • a high peel-strength adhesive may be used to resist inadvertent lift-off, roll or "flagging," i.e., a failure of the dressing to adhere to itself, at the edges of the cover layer 40.
  • the adhesive may include, for example, those adhesives included with the dressing sold under the trademark ULTEC® Hydrocolloid by Kendall Corp., a division of Covidien.
  • Backing layer 44 includes a connective region 50 to permit of connection of portal member 46.
  • Connective region 50 receives a reservoir surface 54 of portal member 46 to fluidly isolate the reservoir surface 54 from an ambient surface 56 on the portal member 46 except through portal member 46.
  • connective region 50 may be adapted to receive reservoir surface 54 directly such that an adhesive coating on either reservoir surface 54 or connective region 50 affixes the portal member 46 to the backing layer 44.
  • Backing layer 44 defines a boundary between reservoir surface 54 and ambient surface 56. This arrangement permits isolation of reservoir surface 54 from reservoir 14, i.e. reservoir surface 54 may be disposed outside of reservoir 14. Perforations 58 may be formed through the connective region 50 to permit fluids to be drawn from reservoir 14. Alternatively, as illustrated in FIG.
  • backing layer 44a may include an entry 50a dimensioned such that a portion of portal member 46a protrudes through backing layer 44a.
  • An appropriately positioned adhesive coating may form a seal between a wound facing side of backing layer 44a and an oppositely oriented surface of a flange 60a. This arrangement permits reservoir surface 54a to be positioned within reservoir 14a fluidly isolating reservoir surface 54a from ambient surface 56a.
  • Other arrangements are contemplated for affixing a portal member 46, 46a to a backing layer 44, 44a, which may include other parts such as sealing rings (not shown).
  • Backing layer 44 may include an interrupted adhesive coating such that only the portions of backing layer 44 forming a seal are coated.
  • backing layer 44 may include a band of adhesive coating around the periphery to form a seal with the skin "s," and another band near the connective region 50 to form a seal with the portal member 46.
  • An intermediate portion of backing layer 44 may remain uncoated to limit the adherence of backing layer 44 to the filler 38, contact layer 34 or other surfaces. Such an arrangement may facilitate removal of the dressing 16 without re-injuring the wound "w.”
  • a portal member 46 may be formed as a rigid component, or alternatively portal member 46 may be molded from a flexible polymeric or elastomeric material. Flexibility in portal member 46 facilitates the placement of wound dressing 16 on curved areas of a patient's skin "s.”
  • Portal member 46 includes a reservoir surface 54 and an ambient surface 56.
  • the reservoir surface 54 is adapted to be positioned such that a primary aperture 64 therein may fluidly communicate with vacuum reservoir 14, through a perforation 58 for example.
  • Ambient surface 56 may be positioned in the environment surrounding dressing 16 and includes an opening 68 adapted for connection to a suction device such as vacuum tube 24 of vacuum system 12.
  • a primary port 70 is defined between the primary aperture 64 and the opening 68 to permit fluid communication between the reservoir 14 and the vacuum system 12.
  • Branching from primary port 70 is a radial array of supplemental ports 72 extending to reservoir surface 54.
  • Each of the supplemental ports 72 terminates at a supplemental aperture 74 distinct from and substantially spaced from primary aperture 64.
  • Any number, distribution and arrangement of supplemental ports 72 may be included to distribute supplemental openings 74 over the reservoir surface 54.
  • FIG. 2 illustrates supplemental apertures 74 may be positioned near a periphery of reservoir surface 54 such that fluids may be drawn from reservoir 14 over a collection area spanning the entire area covered by the portal member 46. Any number, size and arrangement of primary and supplemental apertures 64, 74 is contemplated to effectively draw fluids for a particular application.
  • wound dressing 16 may be installed on a patient to cover a wound "w.”
  • Reservoir 14 is defined by or within wound dressing 16 when applied to the skin "s.”
  • Contact layer 34 is positioned in direct contact with the wound "w” and filler 38 is positioned up to the level of healthy skin “s.”
  • Portal member 46 may be positioned over connective region 50 of backing layer 44 such that the primary and supplemental apertures 64, 74 are aligned with perforations 58. This will allow fluids to be drawn into primary and supplemental ports 70, 72 from reservoir 14.
  • Ambient surface 56 is fluidly isolated from reservoir 14 except through primary and supplemental ports 70, 72. Opening 68 in the ambient surface 56 receives vacuum tube 24, thus fluidly connecting vacuum system 12 with reservoir 14.
  • Evacuating the reservoir 14 may impart a tendency for filler material 38 and wound exudate to migrate in the direction of airflow. This tendency for migration may result in the obstruction or occlusion of one or more of the primary and supplemental ports 70, 72.
  • portal member 46 may include many apertures 64, 74 distributed over the entire area covered by the portal member 46, the effectiveness of the VWT procedure may persist. If one of the apertures 64, 74 becomes clogged, fluids will be drawn to another one of the apertures 64, 74 that is distinct and substantially spaced from the clogged aperture 64, 74.
  • Wound dressing 16a includes a portal member 46a protruding through entry 50a of cover layer 40a.
  • Backing layer 44a adheres to the flange 60a of the portal member 46a and also to the skin "s" such that the reservoir surface 54a and ambient surface 56a are fluidly isolated except through the primary and supplemental ports 70a, 72a.
  • Ambient surface 56a has an opening 68a therein for connection of a suction device such as vacuum tube 24. Fluid communication is thus established between reservoir 14a and vacuum system 12 through primary port 70a, and primary opening 64a.
  • Supplemental ports 72a establish fluid communication between primary port 70a and supplemental apertures 74a in reservoir surface 54a.
  • Supplemental apertures 74a are distinct and substantially spaced from primary aperture 64a. In this arrangement, reservoir surface 54a is enclosed by reservoir 14a.
  • Portal member 46a includes a radial array of supplemental ports 72a such that apertures 64a, 74a may be distributed substantially over the entire reservoir surface 54a. This arrangement provides a means of keeping a collection area of the port 46a exposed to as much of the dressing 16a as possible.

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  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Engineering & Computer Science (AREA)
  • Veterinary Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Public Health (AREA)
  • Vascular Medicine (AREA)
  • Hematology (AREA)
  • Anesthesiology (AREA)
  • Dermatology (AREA)
  • Surgery (AREA)
  • Otolaryngology (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
  • Surgical Instruments (AREA)

Claims (11)

  1. Ein Wundverband (16, 16a) zum Behandeln einer offenen Wunde mit einem Vakuumwundtherapiesystem (10, 10a), beinhaltend:
    eine Kontaktschicht (34), die zum Positionieren angrenzend an eine Wunde (w) angepasst ist; und
    einen Absorptionsfüllstoff (38), das angrenzend an die Kontaktschicht (34) innerhalb des Wundbetts (w) positioniert ist, zum Sammeln von aus dem Wundbett (w) exsudierten Flüssigkeiten;
    eine Unterschicht (44, 44a) zum Positionieren über der Wunde (w), um einen Speicher (14, 14a) zu definieren, in dem über der Wunde (w) ein reduzierter Druck aufrechterhalten werden kann; und
    ein Kanalelement (46, 46a), das an der Unterschicht (44, 44a) fixiert ist, so dass eine Umgebungsoberfläche (56, 56a) des Kanalelements (46, 46a) von einer Speicheroberfläche (54, 54a) des Kanalelements (46, 46a) fluidisch isoliert werden kann, wobei die Unterschicht (44, 44a) eine Grenze zwischen der Umgebungsoberfläche (56, 56a) und der Speicheroberfläche (54, 54a) definiert, wenn die Unterschicht (44, 44a) über der Wunde (w) positioniert ist, wobei das Kanalelement (46, 46a) Folgendes beinhaltet:
    einen primären Kanal (70, 70a), der sich zwischen einer Öffnung (68, 68a) in der Umgebungsoberfläche (56, 56a) des Kanalelements (46, 46a) und einem primären Durchlass (64, 64a) in der Speicheroberfläche (54, 54a) des Kanalelements (46, 46a) erstreckt, wobei die Öffnung (68, 68a) zur Verbindung mit einer Saugvorrichtung (24) angepasst ist und der primäre Durchlass (64, 64a) zum Einrichten einer Fluidkommunikation mit dem Speicher (14, 14a) angepasst ist; und
    mindestens einen zusätzlichen Kanal (72, 72a) zum Einrichten einer Fluidkommunikation zwischen dem primären Kanal (70, 70a) und einem zusätzlichen Durchlass (74, 74a) in der Speicheroberfläche (54, 54a) des Kanalelements (46, 46a),
    wobei sich der zusätzliche Durchlass (74, 74a) von dem primären Durchlass (64, 64a) unterscheidet und davon mit Abstand angeordnet ist, dadurch gekennzeichnet, dass der mindestens eine zusätzliche Kanal (72, 72a) eine Vielzahl von zusätzlichen Kanälen (72, 72a) umfasst, wobei sich jeder zusätzliche Kanal (72, 72a) von dem primären Kanal (70, 70a) radial auswärts erstreckt, wobei sich die jeweiligen zusätzlichen Durchlässe (74, 74a) von dem primären Durchlass (64, 64a) unterscheiden und davon mit Abstand angeordnet sind und über dem Absorptionsfüllstoff (38) positioniert sind.
  2. Wundverband (16, 16a) gemäß Anspruch 1, wobei der primäre und die zusätzlichen Durchlässe (64, 64a; 74, 74a) über die gesamte Speicheroberfläche (54, 54a) des Kanalelements (46, 46a) verteilt sind.
  3. Wundverband (16, 16a) gemäß einem der vorhergehenden Ansprüche, wobei das Kanalelement (46, 46a) aus flexiblem polymerem oder elastomerem Material geformt ist.
  4. Wundverband (16, 16a) gemäß Anspruch 1, wobei das Kanalelement (46a) ferner einen Befestigungskragen (60a) beinhaltet, der zur Verbindung mit der Unterschicht (44a) angepasst ist.
  5. Wundverband (16, 16a) gemäß einem der vorhergehenden Ansprüche, wobei die Unterschicht (44, 44a) eine flexible polymere Membran beinhaltet.
  6. Wundverband (16, 16a) gemäß einem der vorhergehenden Ansprüche, wobei die Unterschicht (44, 44a) eine adhäsive Beschichtung um einen Randbereich davon beinhaltet, wobei die adhäsive Beschichtung angepasst ist, um die Unterschicht (44, 44a) über der Wunde zu fixieren und um eine fluiddichte Abdichtung um den Umfang der Wunde (w) bereitzustellen.
  7. Wundverband (16, 16a) gemäß Anspruch 6, wobei die adhäsive Beschichtung unterbrochen ist, so dass ein Zwischenabschnitt der Unterschicht (44, 44a) unbeschichtet bleibt.
  8. Wundverband (16, 16a) gemäß den Ansprüchen 1-7, wobei die Kontaktschicht (34) eine Folie mit konischen Durchlässen ist.
  9. Wundverband (16, 16a) gemäß den Ansprüchen 1-8, wobei das Absorptionsfüllmaterial (38) einen einzelnen Strang aus einem Polyolefinfilament beinhaltet.
  10. Ein Vakuumwundtherapiesystem (10, 10a), das einen Wundverband (16, 16a) gemäß einem der Ansprüche 1-9 beinhaltet und ferner ein Vakuumsystem (12) beinhaltet, das mit dem Speicher (14, 14a) fluidisch kommunizieren kann.
  11. Vakuumwundtherapiesystem (10, 10a) gemäß Anspruch 10, wobei das Vakuumsystem (12) eine Vakuumquelle (18), einen Sammelbehälter (28) und ein Einwegventil (20) umfasst.
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US20090227968A1 (en) 2009-09-10
IL197030A0 (en) 2009-12-24
AU2009200607A1 (en) 2009-09-24
CA2653146A1 (en) 2009-09-07
US9033942B2 (en) 2015-05-19
BRPI0900516A2 (pt) 2009-11-03
CN104287893A (zh) 2015-01-21
ZA200901339B (en) 2010-02-24
CL2009000543A1 (es) 2009-12-18
CO6200101A1 (es) 2010-09-20
EP2098257A1 (de) 2009-09-09
CN101536950A (zh) 2009-09-23
IL197030A (en) 2015-10-29
US9956329B2 (en) 2018-05-01
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CN104287893B (zh) 2017-04-26
US20150314052A1 (en) 2015-11-05

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